Improvement in cutter-heads



UNITED STATES PATENT OFFICE.

GEORGE MONTGOMERY, OF GALENA, ILLINOIS.

IMPROVEMENT IN CUTTER-HEADS.

Specification forming part of Letters Patent No. 155,039, datedSeptember 15, 1874; application filed June 27, 1874.

To all whom it may concern:

Be it known that I, GEORGE MONTGOMERY,

of Galena, in the county of Jo Daviess' and My invention relates to animprovement in the class of reversible cutter-heads; and consists in adouble cutter-head, in combination with the eccentric journal ofarevolving shaft having a radial stop, as hereinafter described.

In the drawing, A represents the shaft, provided with a spindle orjournal, A, placed slightly eccentric thereto. The solid cutterliead B,with two symmetrically-arranged bits or cutting-edges, b, swings on theeccentric spindle, and is stopped in either direction by a radial stopor shoulder, a, of shaft A, and the side shoulders d of the cutter-head,formed by a recess, 01, at the lower rear part of the same. The shoulderor stop a is arranged symmetrically to the point of greatesteccentricity of spindle A, producing thereby the throwing out of thecutting-edge to a greater distance from the axis of the shaft A, whoseshoulder is carried against the stop a. The other cutting-edge isthereby thrown within the circle formed by the revolving outer edge, soas to clear the work completely. By reversing the motion of the shaftthe cutterhead is carried with its opposite shoulder 61 against the stopat, producing thereby the cocentricity of the othercutting-edge, and theclearing of the former. The cutter-head is secured by Washer andlock-nut on the spindle, and automatically reversed by the reversing ofthe shaft-motion, forming thereby a strong, simple, and rapidly-operatedcutting device for molding purposes.

I do not claim cutters having an eccentric connection with a revolvingshaft, to adapt them to be set in or out, according as they are 4required or not required for use.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with shaft A, provided with theeccentric spindle A and fixed radial stop a, of the reversiblecutter-head B, having bits I), and a peripheral slot or recess for saidstop, all constructed in the manner shown and described, for the purposespecified.

GEORGE MONTGOMERY.

Witnesses:

WM. A. DU BoIs, CHARLES FLIoK.

